红帽全球峰会36.8. Applying an ID view to an IdM host group
The ipa idview-apply command accepts the --hostgroups option. However, the option acts as a one-time operation that applies the ID view to hosts that currently belong to the specified host group, but does not dynamically associate the ID view with the host group itself. The --hostgroups option expands the members of the specified host group and applies the --hosts option individually to every one of them.
If you add a new host to the host group later, you must apply the ID view to the new host manually, using the ipa idview-apply command with the --hosts option.
Similarly, if you remove a host from a host group, the ID view is still assigned to the host after the removal. To unapply the ID view from the removed host, you must run the ipa idview-unapply id_view_name --hosts=name_of_the_removed_host command.
Follow this procedure to achieve the following goals:
- How to create a host group and add hosts to it.
- How to apply an ID view to the host group.
- How to add a new host to the host group and apply the ID view to the new host.
Prerequisites
- Ensure that the ID view you want to apply to the host group exists in IdM. For example, to create an ID view to override the GID for an AD user, see Overriding Default Trust View attributes for an AD user on an IdM client with an ID view
Procedure
Create a host group and add hosts to it:
Create a host group. For example, to create a host group named baltimore:
[root@server ~]# ipa hostgroup-add --desc="Baltimore hosts" baltimore --------------------------- Added hostgroup "baltimore" --------------------------- Host-group: baltimore Description: Baltimore hostsAdd hosts to the host group. For example, to add the host102 and host103 to the baltimore host group:
[root@server ~]# ipa hostgroup-add-member --hosts={host102,host103} baltimore Host-group: baltimore Description: Baltimore hosts Member hosts: host102.idm.example.com, host103.idm.example.com ------------------------- Number of members added 2 -------------------------
Apply an ID view to the hosts in the host group. For example, to apply the example_for_host1 ID view to the baltimore host group:
[root@server ~]# ipa idview-apply --hostgroups=baltimore ID View Name: example_for_host1 ----------------------------------------- Applied ID View "example_for_host1" ----------------------------------------- hosts: host102.idm.example.com, host103.idm.example.com --------------------------------------------- Number of hosts the ID View was applied to: 2 ---------------------------------------------Add a new host to the host group and apply the ID view to the new host:
Add a new host to the host group. For example, to add the somehost.idm.example.com host to the baltimore host group:
[root@server ~]# ipa hostgroup-add-member --hosts=somehost.idm.example.com baltimore Host-group: baltimore Description: Baltimore hosts Member hosts: host102.idm.example.com, host103.idm.example.com,somehost.idm.example.com ------------------------- Number of members added 1 -------------------------Optional: Display the ID view information. For example, to display the details about the example_for_host1 ID view:
[root@server ~]# ipa idview-show example_for_host1 --all dn: cn=example_for_host1,cn=views,cn=accounts,dc=idm,dc=example,dc=com ID View Name: example_for_host1 [...] Hosts the view applies to: host102.idm.example.com, host103.idm.example.com objectclass: ipaIDView, top, nsContainerThe output shows that the ID view is not applied to somehost.idm.example.com, the newly-added host in the baltimore host group.
Apply the ID view to the new host. For example, to apply the example_for_host1 ID view to somehost.idm.example.com:
[root@server ~]# ipa idview-apply --host=somehost.idm.example.com ID View Name: example_for_host1 ----------------------------------------- Applied ID View "example_for_host1" ----------------------------------------- hosts: somehost.idm.example.com --------------------------------------------- Number of hosts the ID View was applied to: 1 ---------------------------------------------
Verification
Display the ID view information again:
[root@server ~]# ipa idview-show example_for_host1 --all dn: cn=example_for_host1,cn=views,cn=accounts,dc=idm,dc=example,dc=com ID View Name: example_for_host1 [...] Hosts the view applies to: host102.idm.example.com, host103.idm.example.com, somehost.idm.example.com objectclass: ipaIDView, top, nsContainerThe output shows that ID view is now applied to somehost.idm.example.com, the newly-added host in the baltimore host group.
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